Headset



FIG. 1 is a front view of a headset showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a first perspective front view thereof;

FIG. 4 is a first perspective rear view thereof;

FIG. 5 is a second perspective front view thereof; and,

FIG. 6 is a second perspective rear view. 

The ornamental design for a headset, as shown and described. 